Comment 15 for bug 1228109

Same story here. I tried everything between 12.04 and 14.04, freezing the system randomly. Latest bios upgrade, switching memory banks or disks seems to have nothing to do with the problem. It appears that the last stable distro was 11.10 in 14 out of 15 M91p we have left.

This is not a great deal since we are using 11.10 only to host Virtualbox guests but here the weird thing: system won't freeze wathever guest distro we use (I tried 12.04, 12.10 and 13.10) if we stick on 11.10 on the host.

One more thing. Virtualbox guests running seem to exacerbate the problem (I've seen this in 12.04 and 13.10): number of crashes ranges from 2 to 3 per month to 2 to 3 per week (sometimes twice a day).